IT1198553B - Un gruppo di bobine per un concatenamento con un flusso sostanzialmente isotropico in un dato piano,per sistemi di comunicazione ed altro - Google Patents

Un gruppo di bobine per un concatenamento con un flusso sostanzialmente isotropico in un dato piano,per sistemi di comunicazione ed altro

Info

Publication number
IT1198553B
IT1198553B IT09392/83A IT939283A IT1198553B IT 1198553 B IT1198553 B IT 1198553B IT 09392/83 A IT09392/83 A IT 09392/83A IT 939283 A IT939283 A IT 939283A IT 1198553 B IT1198553 B IT 1198553B
Authority
IT
Italy
Prior art keywords
concatenation
coils
group
communication systems
substantially isotropic
Prior art date
Application number
IT09392/83A
Other languages
English (en)
Other versions
IT8309392A0 (it
Inventor
Thomas A O Gross
R L Barret Jr
Henry F Pfister
Original Assignee
Sensormatic Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Publication of IT8309392A0 publication Critical patent/IT8309392A0/it
Application granted granted Critical
Publication of IT1198553B publication Critical patent/IT1198553B/it

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G08B13/242—Tag deactivation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/02—Fixed inductances of the signal type  without magnetic core

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Burglar Alarm Systems (AREA)
  • Near-Field Transmission Systems (AREA)
  • Parts Printed On Printed Circuit Boards (AREA)
IT09392/83A 1982-04-14 1983-04-12 Un gruppo di bobine per un concatenamento con un flusso sostanzialmente isotropico in un dato piano,per sistemi di comunicazione ed altro IT1198553B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/368,370 US4549186A (en) 1982-04-14 1982-04-14 Coil assembly for substantially isotropic flux linkage in a given plane

Publications (2)

Publication Number Publication Date
IT8309392A0 IT8309392A0 (it) 1983-04-12
IT1198553B true IT1198553B (it) 1988-12-21

Family

ID=23450937

Family Applications (1)

Application Number Title Priority Date Filing Date
IT09392/83A IT1198553B (it) 1982-04-14 1983-04-12 Un gruppo di bobine per un concatenamento con un flusso sostanzialmente isotropico in un dato piano,per sistemi di comunicazione ed altro

Country Status (13)

Country Link
US (1) US4549186A (it)
JP (1) JPS58187028A (it)
BE (1) BE896445A (it)
BR (1) BR8301890A (it)
CA (1) CA1210465A (it)
DE (1) DE3312680A1 (it)
ES (1) ES8403625A1 (it)
FR (1) FR2525384B1 (it)
GB (1) GB2119603B (it)
IT (1) IT1198553B (it)
MX (1) MX153842A (it)
NL (1) NL8301305A (it)
SE (1) SE8302039L (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745401A (en) * 1985-09-09 1988-05-17 Minnesota Mining And Manufacturing Company RF reactivatable marker for electronic article surveillance system
JPH01130608A (ja) * 1987-11-17 1989-05-23 Sharp Corp 自動音場周波数特性補正装置
WO1989007347A1 (en) * 1988-02-04 1989-08-10 Uniscan Ltd. Magnetic field concentrator
US5248989A (en) * 1988-02-04 1993-09-28 Unisan Ltd. Magnetic field concentrator
JP2941484B2 (ja) * 1991-05-31 1999-08-25 株式会社東芝 平面トランス
US5257009A (en) * 1991-08-26 1993-10-26 Sensormatic Electronics Corporation Reradiating EAS tag with voltage dependent capacitance to provide tag activation and deactivation
DE4322987C2 (de) * 1993-07-09 1997-04-10 Erwin Halstrup Spule zur Erzeugung eines magnetischen Wechselfeldes
US9281118B2 (en) * 2012-12-10 2016-03-08 Intel Corporation Cascaded coils for multi-surface coverage in near field communication

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB755756A (en) * 1953-03-17 1956-08-29 Philips Nv Improvements in or relating to radio receivers
US2755468A (en) * 1953-04-02 1956-07-17 Gen Dynamics Corp Antenna combined with magnetic coupling core
US2853557A (en) * 1955-01-28 1958-09-23 Dictograph Products Co Inc Sound distribution system
US2870442A (en) * 1956-03-26 1959-01-20 Wladimir J Polydoroff Ferromagnetic antenna systems
US2953785A (en) * 1956-08-02 1960-09-20 Gasaccumulator Svenska Ab Arrangement for radio direction finding
US3020547A (en) * 1956-08-02 1962-02-06 Gasaccumulator Svenska Ab Arrangement for radio direction finding
GB872050A (en) * 1957-01-19 1961-07-05 Emi Ltd Improvements in or relating to inductances suitable for use in electrical circuits having conductors adhering to insulating supports
NL248852A (it) * 1959-02-27
GB1128885A (en) * 1966-02-24 1968-10-02 Matsushita Electric Ind Co Ltd Improvements in and relating to high frequency apparatus
US3644825A (en) * 1969-12-31 1972-02-22 Texas Instruments Inc Magnetic detection system for detecting movement of an object utilizing signals derived from two orthogonal pickup coils
JPS50136055A (it) * 1974-04-15 1975-10-28
US4025856A (en) * 1976-02-23 1977-05-24 Sode Laurence A Antenna apparatus
US4151405A (en) * 1976-06-24 1979-04-24 Glen Peterson Ferromagnetic marker pairs for detecting objects having marker secured thereto, and method and system for activating, deactivating and using same
US4075618A (en) * 1976-07-15 1978-02-21 Minnesota Mining And Manufacturing Company Magnetic asymmetric antipilferage marker
DE2713151C2 (de) * 1977-03-25 1984-06-14 Industrieelektronik Dr. Ing. Walter Klaschka GmbH & Co, 7533 Tiefenbronn Spulenvorrichtung für Annäherungsschalter
US4187509A (en) * 1977-06-20 1980-02-05 Knogo Corporation Wafer and fastener for use in electronic theft detection system
US4413254A (en) * 1981-09-04 1983-11-01 Sensormatic Electronics Corporation Combined radio and magnetic energy responsive surveillance marker and system

Also Published As

Publication number Publication date
SE8302039L (sv) 1983-10-15
CA1210465A (en) 1986-08-26
GB2119603A (en) 1983-11-16
BR8301890A (pt) 1983-12-20
MX153842A (es) 1987-01-19
FR2525384B1 (fr) 1986-03-14
FR2525384A1 (fr) 1983-10-21
SE8302039D0 (sv) 1983-04-13
DE3312680A1 (de) 1983-10-27
JPS58187028A (ja) 1983-11-01
NL8301305A (nl) 1983-11-01
US4549186A (en) 1985-10-22
ES520373A0 (es) 1984-03-16
GB2119603B (en) 1986-02-12
ES8403625A1 (es) 1984-03-16
BE896445A (fr) 1983-08-01
IT8309392A0 (it) 1983-04-12

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